654321634 has 4 divisors (see below), whose sum is σ = 981482454. Its totient is φ = 327160816.

The previous prime is 654321617. The next prime is 654321643. The reversal of 654321634 is 436123456.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 556252225 + 98069409 = 23585^2 + 9903^2 .

It is an alternating number because its digits alternate between even and odd.

It is a self number, because there is not a number n which added to its sum of digits gives 654321634.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 163580407 + ... + 163580410.

Almost surely, 2^654321634 is an apocalyptic number.

654321634 is a deficient number, since it is larger than the sum of its proper divisors (327160820).

654321634 is a wasteful number, since it uses less digits than its factorization.

654321634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327160819.

The product of its digits is 51840, while the sum is 34.

The square root of 654321634 is about 25579.7113744467. The cubic root of 654321634 is about 868.1546449814.

The spelling of 654321634 in words is "six hundred fifty-four million, three hundred twenty-one thousand, six hundred thirty-four".